Autor: Polak, M.P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Bovine neonatal pancytopenia in calves in Poland
Autorzy:: Jaskowski, J.M.
Polak, M.P.
Marszalek, A.
Nowak, K.
Frackowiak, H.
Olechnowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/30613.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bovine neonatal pancytopenia
calf
symptom
bleeding
diathesis
thrombocytopenia
ecchymosis
etiology
Polska
Opis:: Bovine neonatal pancytopenia (BNP), a newly emerged syndrome of discussed etiology in calves, has been diagnosed since 2006. Here we describe first cases of BNP in Poland. Between September 2008 and April 2011, 62 cases of BNP were diagnosed in dairy calves. Bleeding skin lesions were mostly pronounced in summer and early autumn. Severe thrombocytopenia was observed in all sick animals. All calves came from herds vaccinated against BVDV infection with PregSure BVD vaccine (Pfizer). Substitution of colostrum from dams of BNP positive calves with colostrum from dams from herds free of BNP was the only effective measure to avoid new cases in affected herds.
Źródło:: Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Awifauna doliny Belnianki pod Daleszycami [woj.Swietokrzyskie] w okresie zimowania i przelotow w latach 1995-1996
Autorzy:: Wilniewczyc, P.
Polak, M.
Powiązania:: https://bibliotekanauki.pl/articles/32795.pdf
Data publikacji:: 2002
Wydawca:: Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:: awifauna
ptaki
Daleszyce
zimowanie zwierzat
przeloty ptakow
dolina Belnianki
Źródło:: Kulon; 2002, 07, 1-2; 41-72
1427-3098
Pojawia się w:: Kulon
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The optimisation of biomass combustion in small boilers
Autorzy:: Polak, M.
Neuberger, P.
Powiązania:: https://bibliotekanauki.pl/articles/59899.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: optimization
biomass combustion
small boiler
boiler
power generation
heat generation
biofuel
Opis:: Biomass contains chemical energy which is a transformed Sun radiation. This energy can be used in many different ways. One of these is a direct combustion which is the most popular. The direct combustion of biomass is a technology which is well proven in large-scale heat and power generation. However, the situation in the small-scale heat generation is not so good. This paper describes results from the experimental combustion with various kinds of biomass in three different combustion devices. Saw dust is used in the experiment described below. The aim is to choose the best biofuel modification and the best way for its combustion from the point of view of power and emission parameters. As for the so far reached results of the experiment, the best in case of saw dust is the combustion with gasification of saw dust briquettes on stable grate without primary air or pellets in bottom supplied burner.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2008, 06
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wpływ recyrkulacji spalin na proces spalania biomasy
Effect of combustion gas recirculation on biomass burning process
Autorzy:: Polák, M.
Neuberger, P.
Rutkowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/291806.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: biomasa
spalanie
tlenek azotu
recyrkulacja spalin
biomass
burning
nitrogen oxide
exhaust gas recirculation (EGR)
Opis:: W procesie spalania biopaliw, pochodzenia roślinnego pojawia się problem zwiększonej koncentracji tlenków azotu w odprowadzanych spalinach. Aby obniżyć zawartość tlenków azotu w spalinach kotłów wielkoprzemysłowych stosuje się recyrkulację spalin. Celem prowadzonych badań było sprawdzenie wymienionej technologii w kotłach małej mocy podczas procesu spalania biomasy. Przedmiotem badań był kocioł wodny o mocy 25 kW gdzie jako paliwo stosowano pelety z drewna o średnicy 8 cm oraz ziarno żyta. Uzyskane wyniki badań potwierdziły rozpatrywaną wyżej analogię. Najkorzystniejsze wyniki uzyskano przy recyrkulacji r = 0,3 ze współczynnikiem nadmiaru powietrza [lambda] = 1,3÷1,4 przy spalaniu pelet z drewna, zaś [lambda] = 1,5÷1,6 w przypadku spalania ziarna żyta.
There is a problem of increased concentration of nitrogen oxides in exhaust systems in the process of biofuel originating from plants. Ehaust gas recirculation is used in order to reduce nitrogen oxide content in the industrial boilers. The purpose of research was to apply and observe the mentioned process in small power boilers during the process of biomass burning. A 25 kW water boiler burning 8 cm dia. wood pellets and rye grain was selected as the subject of research. The obtained results confirmed analogy mentioned above. Most beneficial results were obtained at recirculation r = 0.3 using air ratio [lambda] = 1.3÷1.4 while burning wood pellets, while air ratio of [lambda] = 1.5÷1.6 was used for burning of grain.
Źródło:: Inżynieria Rolnicza; 2007, R. 11, nr 7 (95), 7 (95); 169-176
1429-7264
Pojawia się w:: Inżynieria Rolnicza
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Heat recuperation from exhaust air in a sports hall with swimming pool
Autorzy:: Nuberger, P.
Sleger, V.
Polak, M.
Powiązania:: https://bibliotekanauki.pl/articles/60995.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Opis:: This paper deals with the determination of several efficiency types of a cross-current recovery exchanger which is a part of the air venting system in the swimming pool hall on the premises of the Czech University of Life Sciences (CULS) in Prague. The product is a cross-current plate exchanger with a heat-exchanging surface of antirust aluminium. According to the manufacturer, the exchanger is fit for temperatures common in air ventilation systems. The air is forced in by fans at a flow quantity of 16,000 m3, maximum speed 2000 rpm, electric motor output 7.5 kW, filters for the air coming from the outside – grade G4, pressure loss from 42 to 200 Pa, filters for the air coming from the inside – grade G3, pressure loss from 46 to 200 Pa. The results presented are derived from in-process measurements taken on 31 January 2007 and 7 February 2007, from 9.15 to 11.30 on both days. Air temperature and air humidity were measured with 9636-51B-type sensors by Ahlborn, connected to the AHLBORN ALMEMO 5990-2 centre. These sensors were placed into each of the four input/output channels, very close to the exchanger itself (Fig. 2). The data measured were saved in the centre memory every minute. Figures 3, 4, 5 and 6 show the temperature and humidity curves at the exchanger inlets and outlets on measurement days as well as outside air temperature (te) and outside air relative humidity (φe) captured by the met station on the CULS premises. Table 2 shows efficiency ranges calculated according to relations (1), (3), (4), (5), and (6) for air parameters ascertained at exchanger inlets and outlets on 31 January and 7 February 2007 and the calculated flow rates (Table 1). The difference between the outside temperature te and outside humidity φe values taken by the met station and the temperature te1 and humidity φe1 values measured at the recuperator inlet can be explained as resulting from the air being drawn in from the premises affected by the building and 8-m air piping situated in the building’s interior. Heat transmission to the surrounding air occurs despite the mineral wool heat insulation applied to the air piping. The slight increase of thermal efficiency observed on 7 February 2007 resulted from throttling down the recuperator feed air inlet flaps. Reducing the heated air discharge volume (see Table 1) resulted in a greater temperature difference te2 – te1. Energetic efficiency η is lower than thermal efficiency ηt because equation 3 takes into account the effect of condensed vapours in the cooled waste air. According to the manufacturers, the efficiency of top-class exchangers exceeds 70 %. This value might suggest that almost all the air energy available in the given space is utilised. Closer examination reveals that what is presented is thermal efficiency, which is always higher than other kinds of efficiency (see Table 2). Low exergetic efficiency is a sign that there still is a potential in terms of transmission of recovered air utilised energy (exergy).
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2007, 3
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Oznaczanie poziomu zawartości B(a)P w rynkowych przetworach mięsnych z wykorzystaniem HPLC
Autorzy:: Kubiak, M. S.
Polak, M.
Piszcz, P.
Powiązania:: https://bibliotekanauki.pl/articles/92330.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:: skażenie środowiska naturalnego
zanieczyszczenia artykułów rolno-spożywczych
przetwory mięsne
HPLC
Opis:: Zagadnienia związane ze skażeniem środowiska naturalnego oraz zanieczyszczeniami artykułów rolno-spożywczych wzbudzają zainteresowanie społeczeństwa już od kilku lat. W związku ze wzrostem uprzemysłowienia w ciągu ostatnich kilku dekad, ilość związków chemicznych, wprowadzonych do środowiska naturalnego przez człowieka, osiągnęła ogromne rozmiary.
Źródło:: Camera Separatoria; 2010, 2, (monographs No. 122); 153-167
2083-6392
2299-6265
Pojawia się w:: Camera Separatoria
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Sprawozdanie z obraczkowania ptakow na stawach w Gorkach w latach 1997-1998
Autorzy:: Polak, M
Szczepaniak, W.
Ziecik, P.
Powiązania:: https://bibliotekanauki.pl/articles/32886.pdf
Data publikacji:: 1998
Wydawca:: Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:: ptaki
Gorki
obraczkowanie
Źródło:: Kulon; 1998, 03, 2; 215-217
1427-3098
Pojawia się w:: Kulon
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Influence of the type of inserts on dimensional accuracy in turning process
Wpływ typu narzędzia na dokładność wymiarową procesu toczenia
Autorzy:: Polák, P.
Žitňanský, J.
Adamik, M.
Powiązania:: https://bibliotekanauki.pl/articles/410166.pdf
Data publikacji:: 2015
Wydawca:: STE GROUP
Tematy:: turning
dimensional accuracy
cutting edge
chip breaker
toczenie
dokładność wymiarowa
krawędź tnąca
nóż tokarski
Opis:: This article is aimed to demonstrate the effect of cutting material and geometry of inserts chip breaker for dimensional accuracy in turning. The experiment is aimed on measuring compliance with dimensional accuracy in turning of samples from steel 11 523 at a constant feed rate and depth of cut, with varying spindle speeds. Machining was performed by using a different types of replaceable inserts. The measurement results will be evaluated in terms of the impact of differ-ent geometry characteristics and changing speeds spindle.
Celem artykułu jest przedstawienie wpływu obrabianego materiału i geometrii noża na wymiarową dokładność procesu toczenia. Eksperyment jest zorientowany na pomiar zgodności próbek wykonanych ze stali 11 523 z zadaną dokładnością wykonania zawartą w dokumentacji technicznej, ze stałym posuwem oraz głębokością toczenia oraz zmienną prędkością obrotową. Obróbka została wykonana z użyciem różnego rodzaju narzędzi. Wyniki pomiarów oceniono z perspektywy wpływu charakterystyk geometrycznych oraz zmian prędkości obrotowej.
Źródło:: Management Systems in Production Engineering; 2015, 3 (19); 128-132
2299-0461
Pojawia się w:: Management Systems in Production Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The practical experience with adiabatic cooling withfogging systems in the houses for pig breeding
Praktyczne doświadczeniab z adiabatycznym chłodzeniem pomieszczeń chlewni za pomocą systemów zamgławiania
Autorzy:: Neuberger, P.
Sleger, V.
Polak, M.
Powiązania:: https://bibliotekanauki.pl/articles/804334.pdf
Data publikacji:: 2002
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Opis:: Heat stress of domestic animals has the increasing influence on the farming economy in Central Europe. It is not caused only by global warming. Substantial share in this situation has the introduction of new races of animals of higher productivity. On the other hand, breeding of the highly productive animals has a negative influence on moisture and heat increase. These problems can be solved by using direct adiabatic cooling system which is used especially in poultry production nowadays. An effort was made to use this technology for pig breeds too. The paper summarises the results from the observation focused on the comparison of cooled and non-cooled stable for pig breeding. The installation of this cooling system is one of the first example in pig houses in the Czech Republic. The decrease of air temperature by about 2.5-3 K was reached by means of evaporative cooling. However, it should be said, that the system was not adjusted to optimal parameters during the experiment, yet. We can expect the temperature decrease of about 5.5-6 K after the optimal adjustment.
Stres termiczny zwierząt ma rosnące znaczenie dla produkcji zwierzęcej i jej ekonomiki w krajach Europy Centralnej. Wprowadzanie do produkcji nowych ras zwierząt o wyższej produktywności powoduje wzrost wilgotności i temperatury powietrza w budynkach, co jest przyczyną stresu u zwierząt. Ten problem może być rozwiązany przez chłodzenie adiabatyczne, które jest stosowane szczególnie w produkcji drobiarskiej. Istnieje potrzeba zastosowania tej technologii w produkcji trzody chlewnej. Artykuł prezentuje dane porównawcze chlewni chłodzonych i niechłodzonych. Instalacja takiego systemu chłodzenia należy do pierwszych w Czechach. Dzięki chłodzeniu przez odparowanie uzyskano obniżenie temperatury powietrza o 2,5-3 K. Należy stwierdzić, że system nie był optymalnie skonfigurowany. Po jego usprawnieniu można oczekiwać obniżenia temperatury powietrza o 5,5-6 K.
Źródło:: Zeszyty Problemowe Postępów Nauk Rolniczych; 2002, 486, 1
0084-5477
Pojawia się w:: Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Energy sorrel - an alternative fuel for rural areas
Autorzy:: Polak, M.
Neuberger, P.
Sleger, V.
Powiązania:: https://bibliotekanauki.pl/articles/61420.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Opis:: The research is focused on energy sorrel as a fuel for local low-power heating systems with output up to 100 kW. Sorrel is perennial plant surviving in its location nearly 18 years which is very good from the point of crop expenses. It is a robust plant with height of about 2 m in second year of plantation. Dry phytomass is energetically rich fuel with total heating value 17.5 – 18.0 MJ.kg-1 at the average yield of 10 tons per hectare. An experimental combustion of pure sorrel and its blends were done with boiler VERNER A25 – a hot water boiler for pellets. 11 different sorrel fuels consisting of 5 primary kinds were tested during the experiment: sorrel (Rumex tianshanicus x Rumex patientia), Phalaroides arundinacea, Canabis sativa, pine-bark, sorrel (Rumex tianshanicus x Rumex patientia), brown coal. Based on collected data it is possible to obtain an overview of these fuels and their emission properties. Satisfactory values of CO concentration are possible to gain partly by choosing appropriate combustion device and its settings and partly by mixing with other types of fuel. In the case of sorrel the combination of both has been shown very useful. It is very hard to combust sorrel only, and its testing proves unsatisfactory results. But if we combust blend of sorrel and canary grass 1:1 in the same device, the results are somewhat better. The best results can be reached if we burn this blend in more suitable device. By this way it is even possible to fulfil the emission limits. However, if we burn only pure sorrel in another burner, the emissions are very dissatisfactory again. Another possibility of how to burn sorrel effectively is to combine it with brow coal. On the basis of received results, fuel containing 10 to 20 % of coal can be recommended. From point of view of ash properties pure sorrel appears a problematic fuel. During our experiment ash accumulation in combustion chamber was observed. Unburnt fuel blocked air intakes which caused burning deterioration and increase of CO emissions. All above mentioned facts indicate that sorrel burning is possible if we fulfil all demands required for this fuel. Combustion of pure sorrel in any device without special settings means in many cases non effective use of fuel and bad emissions.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2007, 3
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Feasibility of using heat-recovery exchangers in livestock buildings at a site at a specific altitude with a specific average outdoor air temperature
Autorzy:: Sleger, V.
Neuberger, P.
Polak, M.
Powiązania:: https://bibliotekanauki.pl/articles/62353.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: feasibility
heat-recovery exchanger
livestock building
outdoor air temperature
climate condition
Czech Republic
agriculture
air temperature
weather station
ventilation
air exchange
heat exchanger
Opis:: The installation of an energy-saving facility must be preceded by analysis of its financial effectiveness. Among methods enabling such evaluation is the basic net profit calculation method. For this, the annual consumption of electricity for ventilation or of thermal energy for heating must be determined. The calculation formula uses the sum of energies for temperatures within the range from the calculation temperature for the area in question to the long-term average of the maximum temperature at the site, or to the temperature at which the heating power is zero. It is necessary to know the summary time of occurrence of a given temperature during a year. The site data can only be assessed based on long-term meteorological information. In fact, data used by current national standards to describe climatic conditions in the Czech Republic are from the years 1901 to 1950. The dependence of the average yearly temperature on altitude is shown in Fig. 1 for the 1961 1990 and 1991 2000 periods. It is evident that the average temperatures for the latter period are nearly 0.6 K higher than those for the former period, irrespective of the altitude. In this paper the climatic conditions are assessed based on daily data measured throughout the period from 1 January 1991 to 31 December 2000. Weather stations were selected so as to achieve a uniform coverage and continuity of measurement at each site (as far as possible). All the stations lie in the Czech Republic between 48.8° and 50.8° north latitude at altitudes from 158 m to 1324 m. It was the objective of this examination, based on the meteorological data collected to calculate the average number of days and hours during which the temperature during the year is lower than a specific limiting level, in dependence on the average yearly temperature of the site. Fig. 3 shows the average number of days in a year during which a temperature lower than a selected limiting level occurs, as calculated for the 1991 2000 period. The results are presented for 4 areas with average yearly temperatures of 6 °C 7 °C, 7 °C 8 °C, 8 °C 9 °C, and 9 °C 10 °C, respectively. The graphs enables us to ascertain the number of days during which a heating facility is in operation if the facility is activated by outdoor air temperature decrease to below a specific limiting level. If a typical daily temperature wave is considered, the method makes it possible to estimate the number of hours during which the air temperature is lower than the limiting level chosen. The difference between the data for various limiting levels allows us, for an area with a specific average yearly temperature to ascertain the time of occurrence of outdoor temperature within various ranges. The results of calculations are shown in Fig. 4 and Table 1. The method applied enables underlying data to be prepared for the assessment of energy demands for air heating at a given site and for estimation of the energy savings that could be achieved by installing economical air heating facilities in livestock buildings.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2009, 07
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Bone losses in obese, ovariectomized rats appear to be independent from sclerostin-induced inhibition of the Wnt/β-catenin pathway
Autorzy:: Radzki, R.P.
Bieńko, M.
Filip, R.
Polak, P.
Michalik Wolska, J.
Powiązania:: https://bibliotekanauki.pl/articles/2085877.pdf
Data publikacji:: 2020
Wydawca:: Instytut Medycyny Wsi
Tematy:: dietary induced obesity
bone
sclerostin
pQCT
DXA
rats
ovariectomy
Opis:: Introduction. Overweight and obesity, as well as a gonadal function, are pivotal factors influencing bone tissue metabolism. Materials and method. The aim of the study was to determine the effect of dietary induced obesity (DIO) on bone tissue metabolism in sham-operated (SHO) or ovariectomized (OVX) adult female Wistar rats. Additionally, the influence of DIO in SHO or OVX on the concentration of sclerostin in the blood serum was analyzed. After SHO or OVX, the rats were placed in groups (n=8) and either received a standard diet (11.5 MJ/kg) (SHO-CON; OVX-CON) or a high-energy diet (17.6 MJ/kg) (SHO-FAT; OVX-FAT). The experiment lasted for 90 days and allowed for the establishment of osteopenia in OVX females and obesity in the rats that had received the high-energy diet. Results. The results of the study demonstrate that obesity or/and ovariectomy increases the resorption of femora and tibiae, hence decreasing the densitometric and mechanical parameters affecting the bone structure in adult females rats. The strongest osteodegenerative effect was seen in the OVX-FAT females. Interestingly, the degree of bone tissue degradation caused exclusively by ovariectomy was similar to that found in the obese sham-operated rats. Conclusions. Bone losses invoked by DIO seem to be independent from the Wnt/β-catenin pathway inhibition induced by sclerostin. While further study is necessary, the obtained results suggest that the usage of sclerostin anti-body in the treatment of osteoporosis can be ineffective, and in obese patients the undertaking of such therapy should be reassessed.
Źródło:: Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 394-400
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Magnetic and Structural Study of $Mn_{1.15}Fe_{0.85}P_{1-x}Ge_{x}$ (0.25 < x < 0.32) Magnetocaloric Compounds Prepared by Arc Melting
Autorzy:: Hawelek, L.
Wlodarczyk, P.
Zackiewicz, P.
Polak, M.
Kaminska, M.
Puźniak, R.
Radelytskyi, I.
Kolano-Burian, A.
Powiązania:: https://bibliotekanauki.pl/articles/1402326.pdf
Data publikacji:: 2015-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Sg
75.30.Kz
61.05.C-
61.66.Fn
Opis:: Recently, room temperature magnetocaloric materials increasingly attracted attention in the development of magnetic refrigerators. In this paper, an effect of P/Ge substitution on the magnetic phase transition in the series of $Mn_{1.15}Fe_{0.85}P_{1-x}Ge_{x}$ (0.25 < x < 0.32) magnetocaloric compounds prepared by the arc melting technique and subsequent homogenization process has been studied. Calorimetric and magnetization results show that the temperature of structural phase transition coincide with the Curie temperature and fall within the temperature range 270-355 K. The magnetic entropy change reaches the maximum value for the compound with x=0.28 and equals to 32 J/(kg K) for the magnetic field change of 5 T. The adiabatic temperature change for the same sample, measured using magnetocalorimeter, is equal to 1.2 K for the magnetic field change of 1.7 T. It was found that the increase of Ge content in the sample causes weakening of first order magnetic transition, which is manifested by the lowering difference in transition temperature measured in two zero-field-cooling and field-cooled-cooling regimes.
Źródło:: Acta Physica Polonica A; 2015, 128, 1; 76-80
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: The effect of short- and long-term vibration training on postural stability in men
Autorzy:: Piecha, M.
Król, P.
Juras, G.
Sobota, G.
Polak, A.
Bacik, B.
Powiązania:: https://bibliotekanauki.pl/articles/306693.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: mechanical oscillations
postural sway
whole body vibration
trening wibracyjny
postawa człowieka
Opis:: The study aimed to establish the short- and long-term effects of vibration on postural stability in young men. A single set of exercises and a 4-week vibration training were assessed for their impact on the center of foot pressure (COP) sway. The sample consisted of 49 male subjects randomly allocated to seven comparative groups, six of which exercised on a vibration platform whose parameters were set individually for the groups. Group VII was the control group. The stabilographic signal was recorded before the test commenced, after a single application of vibration, before the last set of exercises of the 4-week vibration training, immediately afterwards, as well as one week and one month after the training ended. The subjects were exposed to vibration 3 times a week for 4 weeks. Both a single application of vibration and the 4-week vibration training had an effect on all parameter values, but most changes were statistically insignificant. Group III was the only one where the COP sway in the anterior-posterior direction significantly increased after a single exposure to vibration and significantly decreased in both anterior-posterior and medio-lateral planes one week after vibration training compared with the pre-test recordings.
Źródło:: Acta of Bioengineering and Biomechanics; 2013, 15, 3; 29-35
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki